aboutsummaryrefslogtreecommitdiffstats
path: root/camel/providers/mbox/camel-mbox-utils.c
diff options
context:
space:
mode:
Diffstat (limited to 'camel/providers/mbox/camel-mbox-utils.c')
-rw-r--r--camel/providers/mbox/camel-mbox-utils.c313
1 files changed, 313 insertions, 0 deletions
diff --git a/camel/providers/mbox/camel-mbox-utils.c b/camel/providers/mbox/camel-mbox-utils.c
new file mode 100644
index 0000000000..9eb4bd1f0d
--- /dev/null
+++ b/camel/providers/mbox/camel-mbox-utils.c
@@ -0,0 +1,313 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
+/* Various utilities for the mbox provider */
+
+/*
+ * Authors :
+ * Bertrand Guiheneuf <bertrand@helixcode.com>
+ *
+ * Copyright (C) 1999 Helix Code.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+ * USA
+ */
+
+
+/* "xev" stands for x-evolution, which is the name of the
+ * evolution specific header where are stored informations
+ * like :
+ * - mail status
+ * - mail uid
+ * ...
+ *
+ *
+ * The evolution line ha10s the following format :
+ *
+ * X-Evolution:XXXXX-X
+ * \___/ \/
+ * UID ---' `- Status
+ *
+ * the UID is internally used as a 32 bits long integer, but only the first 24 bits are
+ * used. The UID is coded as a string on 4 characters. Each character is a 6 bits
+ * integer coded using the b64 alphabet.
+ *
+ */
+
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <errno.h>
+
+
+#include <glib.h>
+#include "camel-mbox-utils.h"
+#include "camel-mbox-parser.h"
+
+
+
+static gchar b64_alphabet[64] =
+"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
+
+
+
+static void
+uid_to_string (guint32 uid, gchar string[4])
+{
+
+ string [0] = b64_alphabet [(uid >> 18) & 0x3f];
+ string [1] = b64_alphabet [(uid >> 12) & 0x3f];
+ string [2] = b64_alphabet [(uid >> 6) & 0x3f];
+ string [3] = b64_alphabet [(uid ) & 0x3f];
+}
+
+
+static guint32
+string_to_uid (gchar *string)
+{
+ guint32 i;
+
+ i =
+ (((string [0] >= 97) ? ( string [0] - 71 ) :
+ ((string [0] >= 65) ? ( string [0] - 65 ) :
+ ((string [0] >= 48) ? ( string [0] + 4 ) :
+ ((string [0] == 43) ? 62 : 63 )))) << 18)
+
+ + (((string [1] >= 97) ? ( string [1] - 71 ) :
+ ((string [1] >= 65) ? ( string [1] - 65 ) :
+ ((string [1] >= 48) ? ( string [1] + 4 ) :
+ ((string [1] == 43) ? 62 : 63 )))) << 12)
+
+
+ + ((((string [2] >= 97) ? ( string [2] - 71 ) :
+ ((string [2] >= 65) ? ( string [2] - 65 ) :
+ ((string [2] >= 48) ? ( string [2] + 4 ) :
+ ((string [2] == 43) ? 62 : 63 ))))) << 6)
+
+
+ + (((string [3] >= 97) ? ( string [3] - 71 ) :
+ ((string [3] >= 65) ? ( string [3] - 65 ) :
+ ((string [3] >= 48) ? ( string [3] + 4 ) :
+ ((string [3] == 43) ? 62 : 63 )))));
+
+ return i;
+
+}
+
+
+static gchar
+flag_to_string (guchar status)
+{
+ return b64_alphabet [status & 0x3f];
+}
+
+
+static guchar
+string_to_flag (gchar string)
+{
+ return (string >= 97) ? ( string - 71 ) :
+ ((string >= 65) ? ( string - 65 ) :
+ ((string >= 48) ? ( string + 4 ) :
+ ((string == 43) ? 62 : 63 )));
+}
+
+
+
+
+
+void
+camel_mbox_xev_parse_header_content (gchar header_content[6],
+ guint32 *uid,
+ guchar status)
+{
+
+ /* we assume that the first 4 characters of the header content
+ are actually the uid stuff. If somebody messed with it ...
+ toooo bad.
+ */
+ *uid = string_to_uid (header_content);
+ status = string_to_flag (header_content[5]);
+}
+
+void
+camel_mbox_xev_write_header_content (gchar header_content[6],
+ guint32 uid,
+ guchar status)
+{
+ uid_to_string (uid, header_content);
+ header_content[5] = flag_to_string (status);
+ header_content[4] = '-';
+}
+
+
+
+
+
+
+static void
+copy_file_chunk (gint fd_src,
+ gint fd_dest,
+ glong nb_bytes,
+ CamelException *ex)
+{
+ gchar buffer [1000];
+ glong nb_to_read;
+ glong nb_read, v;
+
+
+ nb_to_read = nb_bytes;
+ while (nb_to_read > 0) {
+
+ do {
+ nb_read = read (fd_src, buffer, MAX (1000, nb_to_read));
+ } while (nb_read == -1 && errno == EINTR);
+
+ if (nb_read == -1) {
+ camel_exception_set (ex,
+ CAMEL_EXCEPTION_FOLDER_INSUFFICIENT_PERMISSION,
+ "could read from the mbox file");
+ return;
+ }
+
+
+ nb_to_read -= nb_read;
+
+ do {
+ v = write (fd_dest, buffer, nb_read);
+ } while (v == -1 && errno == EINTR);
+
+ if (v == -1) {
+ camel_exception_set (ex,
+ CAMEL_EXCEPTION_FOLDER_INSUFFICIENT_PERMISSION,
+ "could write to the mbox copy file");
+ return;
+ }
+
+
+ }
+
+
+
+}
+
+
+glong
+camel_mbox_write_xev (gchar *mbox_file_name,
+ GArray *summary_information,
+ glong next_uid,
+ CamelException *ex)
+{
+ gint cur_msg;
+ CamelMboxParserMessageInfo *cur_msg_info;
+ gint fd1, fd2;
+ guint bytes_to_copy = 0;
+ glong next_free_uid;
+ gchar xev_header[20] = "X-Evolution:XXXX-X\n";
+ gchar *tmp_file_name;
+ gchar *tmp_file_name_secure;
+ gint rename_result;
+ gint unlink_result;
+
+ tmp_file_name = g_strdup_printf ("__%s__.ev_tmp", mbox_file_name);
+ tmp_file_name_secure = g_strdup_printf ("__%s__.ev_tmp_secure", mbox_file_name);
+
+ fd1 = open (mbox_file_name, O_RDONLY);
+ fd2 = open (tmp_file_name, O_RDWR);
+
+ next_free_uid = next_uid;
+ for (cur_msg = 0; cur_msg < summary_information->len; cur_msg++) {
+
+ cur_msg_info = (CamelMboxParserMessageInfo *)(summary_information->data) + cur_msg;
+ if (cur_msg_info->x_evolution) {
+
+ bytes_to_copy += cur_msg_info->size;
+ } else {
+
+ bytes_to_copy += cur_msg_info->end_of_headers_offset;
+ copy_file_chunk (fd1, fd2, bytes_to_copy, ex);
+ if (camel_exception_get_id (ex)) {
+ close (fd1);
+ close (fd2);
+ goto end;
+ }
+
+ camel_mbox_xev_write_header_content (xev_header + 12, next_free_uid++, 0);
+ write (fd2, xev_header, 19);
+ bytes_to_copy = cur_msg_info->size - cur_msg_info->end_of_headers_offset;
+ cur_msg_info->size += 19;
+ cur_msg_info->x_evolution_offset = cur_msg_info->end_of_headers_offset;
+ cur_msg_info->x_evolution = g_strdup_printf ("%.6s", xev_header + 12);
+ cur_msg_info->end_of_headers_offset += 19;
+ }
+ }
+
+ if (bytes_to_copy > 0)
+ copy_file_chunk (fd1, fd2, bytes_to_copy, ex);
+
+
+ /* close the original file as well as the
+ newly created one */
+ close (fd1);
+ close (fd2);
+
+
+
+ /* replace the mbox file with the temporary
+ file we just created */
+
+ /* first rename the old mbox file to a temporary file */
+ rename_result = rename (mbox_file_name, tmp_file_name_secure);
+ if (rename_result == -1) {
+ camel_exception_set (ex,
+ CAMEL_EXCEPTION_FOLDER_INSUFFICIENT_PERMISSION,
+ "could not rename the mbox file to a temporary file");
+ goto end;
+ }
+
+ /* then rename the newly created mbox file to the name
+ of the original one */
+ rename_result = rename (tmp_file_name, mbox_file_name);
+ if (rename_result == -1) {
+ camel_exception_set (ex,
+ CAMEL_EXCEPTION_FOLDER_INSUFFICIENT_PERMISSION,
+ "could not rename the X-Evolution fed file to the mbox file");
+ goto end;
+ }
+
+ /* finally, remove the old renamed mbox file */
+ unlink_result = unlink (tmp_file_name_secure);
+ if (unlink_result == -1) {
+ camel_exception_set (ex,
+ CAMEL_EXCEPTION_FOLDER_INSUFFICIENT_PERMISSION,
+ "could not remove the saved original mbox file");
+ goto end;
+ }
+
+
+ end: /* free everything and return */
+
+ g_free (tmp_file_name);
+ g_free (tmp_file_name_secure);
+ return next_free_uid;
+}
+
+
+
+
+
+
+
+
generated by cgit (git 2.34.1) at 2024-11-17 15:08:27 +0800